Scrolling Jitters in Unity 5.2.3

I'm making a 2D side scrolling infinite runner game. The sprites all have Rigibody2D and colliders attached. I'm object pooling the sprites to prevent garbage collecting.

When I build and run to iOS using Unity 5.2.3 (xCode7.1.1), the sprites immediately begin to jitter as they scroll across the screen, and it goes on constantly. This happens on my iPad Pro and iPhone 6. However, a build of the same file in Unity 5.2.3 to Mac OS has no jitters at all. It plays beautifully on Mac, but jitters on iOS.

ALSO: When a I build the same exact copy of the project from my other computer that still has Unity 5.2.1 (xCode 7), the game plays perfectly on iOS with no jitters at all. So I'm thinking maybe the problem is with Unity 5.2.3.

Here's the question... Is there something new or different in Unity 5.2.3 that I'm missing? Is it a bug? Should I be clicking something somewhere? This problem didn't exist until I upgraded to 5.2.3.

Thank you in advance for any help or suggestions you can give!

Here is my movement code, for what it's worth:

 public float speed;

 void Update () 
 {
     transform.Translate(transform.right * -speed * Time.deltaTime);
 }